4-String Banjo Chord Chart and Tabs in Whole Step Down Tuning

FbmM7, Fbm#7, Fb-M7, Fb−Δ7, Fb−Δ, Fb minmaj7
Notes: F♭, A♭♭, C♭, E♭
6,6,3,0 (231.)
6,6,7,8 (1123)
6,2,3,4 (4123)